4th axis motor trying to turn before brake is actually released

[dbensavage]

I just install a new centroid 16inlb motor on our 4th axis. I am getting a stall error because the brake does not release quick enough and the motor starts to try and turn thus throwing a stall error. Is there a parameter to have a slight pause like 1/2 second delay after the brake release before the machine attempts motion?
I did install a larger air line and air solenoid valve and it did not rectify the issue. The only solution I've found is to slow down the rotary speed but that doesn't help production...
Any help would be greatly appreciated.
Dennis

[dpascucci_support]

Can you post a current report for the system?
See topic: https://centroidcncforum.com/viewtopic.php?f=64&t=383

[dbensavage]

Attached is a report from the machine

[S-K Machine]

I had a similar situation when I use the 4th axis.
I wound up inserting a pause in the g code before the a axis move..IE P1.5 which pauses 1-1/2 seconds to let the brake release.
If using intercon, you hit more buttons, gcode then put that P 1.5 in.
You could make it dwell longer, I tried P3, then P2 and settled on P1.5.
Try it

[dbensavage]

S-K Machine,
While that would work I'd prefer to have a parameter set in the machine. When M11 is called out there should be a way to have a slight pause before rotation. I only need a fraction of a second. I literally can set the feed rate at about 60 percent and it runs fine. Or I can disconnect the brake and run it at full speed and its fine but I need the rotary's brake for 3+1 machining as that's about all we do, and mostly tool steel work. Programing everything we do with pauses between every rotary motion just isn't an option and shouldn't be necessary.

[tblough]

Is it the chuck clamp or the motor brake? Two different things. If it's the chuck clamp, then M10 and M11 are macro files. Just add your G4 delay in the mfunc10.mac file.

Code: Select all

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------
; Filename: mfunc10.mac
; Mill: SET ClampOn
; Lathe: SET ChuckOpen, RST ChuckClose
; Description: User Customizable Macro
; Notes:Macro will SET ClampOn (Mill Only) or ChuckOpen and RST ChuckClose (Lathe Only)
; Requires: 
; Please see TB300 for tips on writing custom macros.
;------------------------------------------------------------------------------

IF #50010                        ;Prevent lookahead from parsing past here
IF #4201 || #4202 THEN GOTO 1000 ;Skip macro if graphing or searching

N100                             ;Insert your code between N100 and N1000  

M94 /10                          ;Request to SET ClampOn
M95 /6							 ;RST ClampClose (M11)
M94 /4							 ;SET ClampOpen (M10)

N1000                            ;End of Macro

[dbensavage]

It’s the pneumatic brake on the 4th axis, the motor does not have a brake. Is there any instructions on how to get to this file to edit it?

[tblough]

It's in the CNCM folder

[dbensavage]

Below is a picture of the CNCM.M11 File. Where do I type in the G4 parameter. An example would be nice as I'm not familiar with macro's

[dbensavage]

I tried adding G4 P1.5 to the next line under the M95 /4 and get no pause.